All eligible study members were contacted: 2,662 study members gave information, of which 2,474 study members completed a postal questionnaire and 2,229 study members completed a clinic or home visit.
Provided information | 2,662 | ||||||
Cumulative total of deaths | 718 | ||||||
Cumulative permanent refusals (withdrawn from the study) | 594 | ||||||
Currently not resident in England, Scotland or Wales | 567 | ||||||
Failure to contact (unable to contact for 10 years) | 320 | ||||||
A feasibility study on 10% of the NSHD sample living near the Wellcome Trust Clinical Research Facility (CRF) in Manchester took place during 2006-2007. Data from the remaining sample were collected from 2008 to 2010 at CRFs located in Edinburgh, Birmingham, Cardiff and London.
The protocol for the 2006-1010 data collection can be found in the published 2011 cohort profile.1)
The study team and specialist colleagues trained the nurses for 1-2 days at each of the CRFs.
Questionaires used for the main 2008-10 data collection can be found here